Siemens SCALANCE XM-400 Configuration Manual page 177

● Upper IP address
Enter the IPv4 address that specifies the end of the dynamic IPv4 address band. The IPv4
address must be within the network address range you configured for "Subnet".
● Lease Time (sec)
Specify for how many seconds the assigned IPv4 address remains valid. When half the
period of validity has elapsed. the DHCP client can extend the period of the assigned IPv4
address. When the entire time has elapsed, the DHCP client needs to request a new IPv4
address.
Procedure
Enable DHCP server globally
1. Select the "DHCP Server"" check box.
2. Click the "Set Values" button.
Configuring a DHCP pool
1. Click the "Create" button.
A new row with a unique number (Pool ID) is created.
2. Select an IP interface.
3. Click the "Set Values" button.
In the "Port-IP Address Mapping" tab a new row for the pool ID is created. In the "Port"
column, all ports can be selected that currently belong to the selected VLAN.
In the "Port Range" tab a new row for the pool ID is created. In the row, all ports are enabled
that currently belong to the selected VLAN.
The standard options for the pool are created in the "DHCP Options" tab.
4. You have the following options for configuring the pool:
Configuring a DHCP pool for an IPv4 address band
– Enter the subnet, the lower and the upper IPv4 address.
– Enter the lease time.
– Click the "Set Values" button.
Configuring a DHCP pool for an IPv4 address and assigning it to a certain port
– Change to the "Port-IP Address Mapping" tab.
– Select the required port.
– Enter the IPv4 address and the subnet mask.
– Click the "Set Values" button.
– Configure the lease time in the "DHCP Server" tab.
5. Make the settings you require for the pool in the other DHCP tabs.
SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12
In the "Port Range" tab only the selected port is enabled.
In the "DHCP Server" tab the boxes "Subnet", "Lower IP Address" and "Upper IP
Address" are filled accordingly.
Configuring with Web Based Management
5.4 The "System" menu
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